I've been having some trouble with sending and receiving MMS while on a WiFi connection (so almost all the time) since I have stated using my T-Mobile sim on my unlocked Samsung Galaxy S7 Edge phone from Sprint. Everything else seems to work fine e.g. calls, SMS, LTE, but when it comes to MMS it's a complete stalemate. I've tinkered my APN settings in almost every permutation I found online, and I don't have an option for Wi-Fi Calling so there's nothing I can seem to do on that front. A solution to this problem, so I can start receiving MMS again, would be great.
Best answer by tmo_amanda
I did some digging and was able to find that there is a known issue with Galaxy S7 Edge models that have an issue when handing off WiFi to the data network when trying to send MMS'. My recommendation would be to talk with Tech Support via 611 or T-Force (Facebook/Twitter) to get a ticket filed with our Engineers. By chance, have you already done this? If not, give that a shot and keep us updated on the outcome of the ticket.